You might have better luck using dyes that are meant for cosmetics. Since Kool Aid consists of flavor as well as food dye it may behave erratically in a soap. If you like the bright colors that you can get from using Kool Aid try using liquid FD&C dyes. They are similar to the kinds of dyes that are in Kool Aid, but since they'll be in their pure form they may be better behaved. If you google "FD&C dyes" you should be able to find an online supplier pretty easily.
You could try doing a google search for "flavor oils" or "lip balm scents". There are a lot of websites that carry these oils. They are not natural, but when used at the proper percentage they are lip safe. Using flavor oils opens your scenting options up a lot! I've seen some really interesting varieties out there.
They can be a bit pricey, but there are such things as Coffee Essential Oil, Coffee Oil and Coffee Butter. Any of these ingredients can be added to an MP soap to give coffee aroma and properties. But I have a feeling they might turn the soap brown.
I use a solution of Grapefruit Seed Extract and distilled water. So far so good. The Grapefruit Seed Extract tends to kill everything. I had to find a natural alternative to bleach since I'm allergic to it.
Another option is a microwave baby bottle sterilizer. You just have to make sure your containers are microwave safe! If the plastic is too thin it will melt. (Not pretty) And naturally, you can't use it for metal containers.
The good thing about a CO2 Extract is that there is no solvent residue remaining in the extract. Absolutes carry the concern of traces of solvent. That is why they are used more often in perfumery than in aromatherapy. CO2 Extracts are suitable for a wider range of applications. Plus, the use of CO2 pressure to extract plant material allows extraction from some very fragile plants that are unable to withstand the process needed to make an essential oil. Very exciting to plant geeks like me! LOL